Comparing US/EU websites, where YOU are the content, vs Korean and Jap websites that provide content TO you, I included videos among the spy devices. On later thought, videos seemed unlikely. I was about to remove them for 'purity' and then....
Wikileaks latest CIA spy tool is designed to capture videos so Deepstate can tell what you're interested in. Like all other video tools it's built around ffmpeg, the universal video editing engine. And like human perception, it pays special attention to deltas:

pHash threshold [0.0-1.0]
Floating point number that represents a percentage of similarity that if below this value constitutes a “significant change” between two frames in the stream. For use with the image2 encoder only. Default is 0.85. Under most circumstances, the default of 0.85should suffice. WARNING: Too high of
a threshold value can trigger many image frames to be captured and sent over the network. Use wisely.

But what's the purpose of this delta? Detecting steganography? Not likely. Good steganography would be smooth and non-deltaish. Maybe they're looking for camera changes in a video that provides location instructions? Take this road, turn here, park here, go through the front door, turn left, etc?
I wish WL had continued the practice of including code. The first two or three releases included quite a bit of C++ and PY code along with the user guide, which helped Deplorables to figure out HOW Deepstate is destroying us. When the HOW-gas is released and dissipated, the Insatiable machine can't function. Without the code we're just learning what we already know: Deepstate monitors everything.
= = = = =
Later: Oh. WL told us what the delta was for. When I saw the release I went directly to the PDF and didn't notice the description.
RELEASE: CIA system for intercepting video chat and security camera streams.
So the delta was meant to catch each person in the chat, or to catch movements in the security cam. We know from previous releases that the latter was part of a system to defeat the cam when CIA was physically burglarizing a building. Pure criminality.
I should have Read The Fucking Manual Manual before Reading The Fucking Manual. Sorry, WL.

About Me

Polistra was named after the original townsite of Manhattan (the one in Kansas). When I was growing up in Manhattan, I spent a lot of time exploring by foot, bike, and car. I discovered the ruins of an old mill along Wildcat Creek, and decided (inaccurately) that it was the remains of the original site of Polistra. Accurate or not, I've always liked the name, with its echoes of Poland (an under-appreciated friend of freedom) and stars. ==== The title icon is explained here. ==== Switchover: This 2007 entry marks a sharp change in worldview from neocon to pure populist. ===== The long illustrated story of Polistra's Dream is a time-travel fable, attempting to answer the dangerous revision of New Deal history propagated by Amity Shlaes. The Dream has 8 episodes, linked in a chain from the first. This entry explains the Shlaes connection.